Medically reviewed by Susan Bard, MD An itchy rash with blisters can be caused by an allergic reaction; an autoimmune disorder; a bacterial, fungal, or viral infection; and trauma to the skin.

Common types of skin rashes include dermatitis, allergies, insect bites, infections, or health conditions. Examples include eczema, chickenpox, psoriasis, hives, and shingles. It can be hard to ...